The enthalpy of formation of ammonia is `-46.0 kJ mol^(-1)`. The enthalpy change for the reaction
`2NH_(3)(g)rarr2N_(2)(g)+3H_(2)(g)` is
A. 46.0 kJ `mol^(-1)`
B. `92.0 kJ mol^(-1)`
C. `-23.0 kJ mol^(-1)`
D. `-92.0 kJ mol^(-1)`

The enthalpy of formation of ammonia is `-46.0 KJ mol^(-1)` . The enthalpy change for the reaction `2NH_(3)(g)rarr N_(2)(g)+3H_(2)(g)` is :
A. `46.0 KJ mol^(-1)`
B. `92.0 KJ mol^(-1)`
C. `-23.0 KJ mol^(-1)`
D. `-92.0 KJ mol^(-1)`